Comparison

Slitherlink vs Arrow Sudoku

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Slitherlink

Solve logic puzzles by drawing a single loop around clues on a grid. Connect dots to form a continuous line, with no crossings or branches. Offers endless fun and intellectual challenge for puzzle enthusiasts.

Highlights
  • Draw a single continuous loop
  • Surround numbered clues
  • Pure logic, no math required
  • Weekly bonus puzzles
  • Multiple difficulty levels
  • Auto complete clues
  • Highlight link segment
Features
Read full description

Surround each clue with lines to form one single loop! Each puzzle consists of a rectangular lattice of dots with some clues in various places. The object is to connect the dots surrounding each clue so that the number of lines equals the value of the clue and the lines around all clues form one continuous loop with no crossings or branches. Empty squares may be surrounded by any number of lines. Slitherlink are addictive loop-forming puzzles which were invented in Japan. Using pure logic and requiring no math to solve, these fascinating puzzles offer endless fun and intellectual entertainment to puzzle fans of all skills and ages. The game features 2-finger tapping for quick zoom, auto complete clues setting and a link segment highlighting option to help to avoid creating separate loops. To help see the puzzle progress, graphic previews in the puzzle list show the progress of all puzzles in a volume as they are being solved. A Gallery view option provides these previews in a larger format. For more fun, Slitherlink contains no ads and includes a Weekly Bonus section providing an extra free puzzle each week. PUZZLE FEATURES • 200 free Slitherlink puzzles • Extra bonus puzzle published free each week • Multiple difficulty levels from very easy to extremely hard • Grid sizes up to 16x22 • Puzzle library continuously updates with new content • Manually selected, top quality puzzles • Unique solution for each puzzle • Hours of intellectual challenge and fun • Sharpens logic and improves cognitive skills GAMING FEATURES • No ads • Unlimited check puzzle • Unlimited Undo and Redo • Auto complete clues • Highlight link segment • Quick zoom using 2-finger tap • Concurrently playing and saving multiple puzzles • Puzzle filtering, sorting and archiving options • Dark Mode support • Graphic previews showing puzzles progress as they are being solved • Portrait and landscape screen support (iPad only) • Track puzzle solving times • Backup & restore puzzle progress to iCloud ABOUT Slitherlink have also become popular under other names such as Fences, Loop the Loop, Loopy, Suriza, Dotty Dilemma and Number Line. Similar to Sudoku, Kakuro and Hashi, the puzzles are solved using logic alone. All puzzles in this app are produced by Conceptis Ltd. - the leading supplier of logic puzzles to printed and electronic gaming media all over the world. On average, more than 20 million Conceptis puzzles are solved each day in newspapers, magazines, books and online as well as on smartphones and tablets across the world. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.conceptispuzzles.com/index.aspx?uri=info/doc/220

About

Arrow Sudoku

This logic puzzle game introduces a unique arrow mechanic where numbers along the arrow's shaft must sum to the number at its base. Featuring a curated collection of puzzles from popular Sudoku creators, it offers a challenging and educational experience for players of all skill levels.

Highlights
  • Unique arrow puzzle mechanic
  • Puzzles curated by top creators
  • Hybrid puzzle types included
  • Difficulty calibrated for all levels
  • Focus on improving solver skills
  • 100 handcrafted puzzles
Features
Currently charting
Read full description

Presented by Cracking The Cryptic, YouTube’s most popular Sudoku channel, comes a new game based on our frequently requested variant: Arrow Sudoku. In Arrow Sudoku, every puzzle contains a handful of "arrows" laid out in unique patterns. The numbers found along the shaft of the arrow must sum up to the number at the base. This simple rule leads to endless variety in the puzzles you will conquer. Fans of our previous game Miracle Sudoku will enjoy the hybrid puzzles we have included in the collection including Arrow Knight and Arrow Sandwich puzzles. These puzzles were curated by Mark and Simon and include puzzles made by them as well as from a large number of guest creators. Fans of Cracking the Cryptic's YouTube channel will recognize many of these authors as some of the most talented creators working today! In Cracking The Cryptic’s games, players start with zero stars and earn stars by solving puzzles. The more puzzles you solve, the more stars you earn and the more puzzles you get to play. Only the most dedicated (and cleverest) sudoku players will finish all the puzzles. Of course the difficulty is carefully calibrated to ensure lots of puzzles at every level (from easy through to extreme). Anyone familiar with their YouTube channel will know that Simon and Mark take pride in teaching viewers to be better solvers and, in these games, they always craft the puzzles with the mindset of trying to help solvers improve their skills. Mark and Simon have both represented the UK many times at the World Sudoku Championship and you can find more of their puzzles (and lots of others) on the internet’s biggest sudoku channel Cracking The Cryptic. Features: 100 beautiful arrow puzzles by Simon, Mark and guests from their channel

Screenshots

Slitherlink4 screens
Arrow Sudoku3 screens

Verdict

The call

The clearest difference is price: Slitherlink at Free against Arrow Sudoku's $4.99. Slitherlink also leads on update cadence (every 4 months vs every 12 months) and ratings volume (461 vs 45). Arrow Sudoku's advantage is in-app purchases (none vs 13) and chart position (#149 vs unranked). On rating, review sentiment, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Slitherlink is free to download; Arrow Sudoku costs $4.99 up front. Slitherlink sells 13 one-off in-app purchases. Arrow Sudoku asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for Slitherlink against 4.8 for Arrow Sudoku. That said, the two scores are not equally well evidenced: Slitherlink has 461 ratings behind it against 45, so its average is the more settled of the two. Written reviews are what separate them: 89% of Slitherlink's written reviews are positive against 88% of Arrow Sudoku's.

UpkeepUpdate frequency

Slitherlink ships an update every 4 months, Arrow Sudoku every 12 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

Scorecard7 real differences · 4 level
Slitherlink versus Arrow Sudoku: the parameters behind the verdict, then further details
ParameterSlitherlinkArrow Sudoku
PriceFree — better$4.99
Rating4.8 (461 ratings) — better4.8 (45 ratings)
Positive reviews89.5% of reviews — better87.5% of reviews
Number of ratings461 — better45
Update frequencyEvery 4 months — betterEvery 12 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
Best chart rank—#149 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.611.0 — better
Further details — not scored
Size7 MB48 MB
Age rating4+4+
DeveloperConceptis Ltd.Nick Carney

Customer experience

Slitherlink

All ratings457 ratings
Positive96.5%
Neutral2.2%
Negative1.3%
Written reviews171 reviews
Positive89.5%
Neutral7.6%
Negative2.9%

Arrow Sudoku

All ratings45 ratings
Positive93.3%
Neutral4.4%
Negative2.2%
Written reviews16 reviews
Positive87.5%
Neutral0.0%
Negative12.5%

Bugs and requests

Slitherlink

Reported bugs

3 issues
  • App not loading properly for some users
  • Freezing issues on login screen
  • Incompatibility with older devices

Requested features

5 requests
  • Add a dark mode option
  • Implement coloring/marking tools for loop segments
  • Provide more free puzzle content
  • Reduce pricing for puzzle packs
  • Add a rewind/undo feature to go back to previous puzzle states

Arrow Sudoku

Not enough reviews yet to summarise bugs or requests.

In-app purchases

13 purchases

Slitherlink

One-time13
  • Medium Snacks 1$0.99
  • Easy Variety 1$1.99
  • Easy Variety - Large 1$1.99
Show 10 more
  • Medium Variety 1$1.99
  • Medium Variety - Large 1$1.99
  • Hard Variety 1$1.99
  • Easy Variety 2$1.99
  • Medium Variety 2$1.99
  • Hard Variety 2$1.99
  • Big & Easy 1$1.99
  • Big & Medium 1$1.99
  • Hard Variety - Large 1$1.99
  • Big & Tough 1$1.99
None

Arrow Sudoku

No in-app purchases

Questions

Is Slitherlink free?
Slitherlink is free to download, with in-app purchases available.
Is Arrow Sudoku free?
Arrow Sudoku costs $4.99, with no in-app purchases.
Which has better reviews, Slitherlink or Arrow Sudoku?
Slitherlink is rated higher. Slitherlink averages 4.8 out of 5 from 461 ratings, while Arrow Sudoku averages 4.8 from 45 ratings.
Do Slitherlink or Arrow Sudoku have ads?
Neither Slitherlink nor Arrow Sudoku shows ads.
Which is updated more often, Slitherlink or Arrow Sudoku?
Slitherlink ships an update every 4 months, and Arrow Sudoku every 12 months. Most recently, Slitherlink was updated on October 26, 2026 and Arrow Sudoku on October 25, 2026.

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